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On the ascent, at intervals, the eye is fascinated by prospects to the north and east over Val di Chiana, Cortona, Thrasymene, Chiusi; to south and west over Monte Cetona, Radicofani, Monte Amiata, the Val d'Ombrone, and the Sienese Contado.
It has been already stated that, in order to prevent the overflow of the valley of the Tiber by freely draining the Val di Chiana into it, the Papal authorities, long before the commencement of the Tuscan works, constructed strong barriers near the southern end of the valley, which detained the waters of the wet season until they could be gradually drawn off into the Paglia.
Then, profiting by the terror that had been spread throughout all this part of Italy by the successive captures of the duchy of Urbino, of Camerino, and of Arezzo, he marched upon Monte San Severino, Castiglione, Aretino, Cortone, and the other towns of the valley of Chiana, which submitted one after the other almost without a struggle.
The succcess with which human guidance has made the operations of nature herself available for the restoration of her disturbed harmonies, in the Val di Chiana and the Tuscan Maremma, is among the noblest, if not the most brilliant achievements of modern engineering, and, regarded in all its bearings on the great question of which I have just spoken, it is, as an example, of more importance to the general interests of humanity than the proudest work of internal improvement that mechanical means have yet constructed.
There is, however, in the improvement of the sanitary condition of the Val di Chiana, which was formerly extremely unhealthy, satisfactory proof of a beneficial climatic change. The fevers, which not only decimated the population of the low grounds but infested the adjacent hills, have ceased their ravages, and are now not more frequent than in other parts of Tuscany.
The immense results obtained from the operations of the Tuscan engineers in the Val di Chiana, and the Maremma have suggested the question, whether a different method of accomplishing these objects might not have been adopted with advantage.
A proof of the restoration of salubrity in the Val di Chiana is furnished by these aerial visitors, which had never before been seen in those low grounds, but which have appeared within a few years at Forano and other points similarly situated."
It is now a hundred years since the commencement of the improvements in the Val di Chiana, and those of the Maremma have been in more or less continued operation for above a generation.
It has been argued, as in the case of the Po, that a system of transverse inland dikes and canals, upon the principle of those which have been so successfully employed in the Val di Chiana and in Egypt, might have elevated the low grounds above the ocean tides, by spreading over them the sediment brought down by the Rhine, the Maes, and the Scheld.
The draining of the great marshes of the Chiana, between Arezzo and Chiusi, was a well-considered and most beneficent work on a magnificent scale, which, so far from "drying pockets," added enormously to the wealth of the country, and is now adding very appreciably to the prosperity of Italy. Nor was Giusti's reproach in any way merited by the Grand Ducal government.
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